Mechanical coal and rock mining machine



Nov. 4 1924- A. LINNEMANN MECHANICAL COAL AND ROCK MINING MACHINE Filed July 29, 1924 Patented Nov. 4, 1924.

UNITED STATES ADOLF LINNEMANN, 0F BERLIN. GERMANY.

MECHANICAL COAL AND Application filed. July 29.

To all whom it may concern:

Be it known that I, AnoLF LINNEMANN, a citizen of the German Republic, residing at Berlin, Germany, Scharnhorststr 9, have invented certain new and useful Improvements in Mechanical Coal and Rock Mining Machine (for which I have filed an application in Germany on Feb. 10, 1923), of which the following is a specification.

The object of this invention is to provide improved means for mining coal and rock.

A further object of this invention is to provide improved means for breaking portions of coal ofi the face of a vein or portions of rock off the solid rock.

The invention relates to a mechanical contrivance adapted to obtain this object in deep level mining as well as in surface or open working without the use of explosives and similar materials.

In the drawing accompanying this application and forming part thereof, a modification embodying the principle of my invention has been illustrated by way of example,

1 the illustration disclosing a longitudinal sectional view of the tool.

In the construction of the machine or tool as shown, the character (a) is denoting a tube, preferably made from a material of great resisting strength, such as steel; fixed to the back-end of this tube, so as to form an integral part of same, is a nut (79), in which a threaded spindle or feed bar (0) may be screwed forward and backward, for instance by means of a spanner, hand-wheel or the like, which may be placed upon the end of threaded feed bar (a) projecting from the back end of the tube (a). Inserted and guided in the fore portion of the tube is a rod and a pressure plate or step-block (f) is provided at the front end of rod (6).

The middle portion of the rod (6) is formed to wedge shape, and this wedgeshaped portion, when the rod (6) is being pushed ahead in the tube (a), is taking eifect against the inner faces of the wedgeshaped jaws (g), pressing and pushing out the jaws through Suitable apertures in the tube (a) in correspondence to the taper of the wedge-shaped portion of the shaft (0).

The rod (6) is being pushed ahead within the tube (a) by the forward movement of the feed bar (0) caused by turning the span ner or hand-wheel at its back-end.

In order to facilitate the rotary operation ROCK MINING MACHINE.

1924. serial No. 728,927.

of the feed bar (0) and the rod It is, however, quite possible also, to make the feed bar (0) act directly on the rod The operation of the tool in practical use takes place in the manner described in the following:

A hole is being bored into the coal or rock, said hole having a free width corresponding to the outside diameter of the tube (a). The jaws (g) are in alignment with the outside surface of the tube (a), so that the tool is adapted to be inserted into the hole drilled into the coal or rock. As soon as the thrustplate or step-block (f) is abutting against the bottom of the drill hole, and the feed bar (0) is being screwed further into the nut (Z2), thewedge-shaped portion of the rod (6) is pushing and forcing thejaws (g) outward, so that the cutting edges of the jaws will enter and penetrate intothe coal or rock surrounding the tube (a). During this operation the single layers of the coal or rock will crack and break up. The feed bar (0) is now being rotated further in the same sense, and through this action the tube (a) is being moved backward in the drilled hole, and, at the same time, the jaws (g), penetrated into the coal or the rock, will catch and tear along with themselves towards the entrance of the drill hole the split-off coal or rock, so that the latter may be cleared away after the removal of the coal breaking tool.

In the case under consideration it is not necessary to pick or cut the coal in the region surrounding the drill hole. The coal is being cracked, therefore, entirely without picking or cutting.

Instead of having a wedge-shaped portion provided at the rod (6) for pushing the jaws (g), a suitable lever-action may be arranged intermediate the rod and the jaws (g), without affecting in any way the principle of the present invention.

I claim:

1. In a coaland rock-mining machine, the combination with a tube adapted to be inserted into a hole drilled into the coal and jaws operatively arranged in the further portion of said tube, said jaws adapted to penetrate into the surrounding coal or rock, of a nut integrally fixed to said tube, a feed bar, a rod and a step-block, substantially as set forth.

2. In a coaland rock-mining machine, the combination with a tube adapted tube insubstantially as set forth;

vranged in the fore-,portion serted into a hole drilled into the coal and jaws operatively arranged in the further portion of said tube, said jaws adapted to penetrate into the surrounding coal, of a nut integrally fixed to said tube, said tube aper lured to permit the passage of said jaws, a threaded feed bar, a rod and a step-block, substantially as set forth.

3. In a coaland rock-mining machine, the combination with a tube, jaws arranged in the fore-portion of said tube and adapted to penetrate into the surrounding coal 01' rock, of a nut integrallyifixed tosaid tube, said tube apertured so as to permit the passage of the said jaws, a threaded feed-bar adapted to screw forward and backward in said nut, a rod arranged in front of said .feed vbar within said tube (and adaptedto slide within said tube with the forward movement of saidf-eed bar, and a step-block,

4. In a 'coaland rock-mining machine, the combination with a tube and jaws arranged in the fore-portion of said tube, of a nut integrally fixed to said tube, said tube apertured to takesaid jaws a threaded feed "bar adapted to screw in said nut, ,a :rod

adapted .to :be moved ahead by said ifeed :bar within saidtube, the uniddle section of said trod shaped to "form .a wedge-portion, the taperof said wedge-portion running forward, and a step-block, substantially as set forth.

5. in a coaland rock-mining machine, the combination Wltl1:3, tL1b8,'a11Cl jaws arranged in the fore portion of said tube, of a nut integrally fixed-tothe said tube, said tube apertured to takesaidjaws a threaded lfeed bar adapted to screw in said nut, and a rod :adapted to be moved forward by said feed bar wit-himsai'd tube, the middle ;portion of said rod shaped to form a wedge :portion, the taper of said wedge-portion running forward, the [inclined surfaces of said tapering wedge-portion in engagement with the back-faces of said jaws. the wedge .portion thereby :adapted to :drive the said jaws radially into the rock, substantially as set forth. 1

6. In a coaland rockfmining machine, the combination with a tube, and jaws-arof said tubeand adapted to penetrateiinto the surrounding coal or rock, .of a nut integrally fixed to said tube, said tube apertured so to perniit the passage of the said ,j aws, a threaded feed bar adapted to screw forward and backward in said .nut, a rod arranged in front of said feed bar within said tube and adapted to slide within "said tube with the forward movementofsaid feed bar, and

a step-block arranged at the forward end of thesaidirochsaid step-block adapted to rest against the bottom of the hole drilled into the coal or .rock, substantially as set forth. 7

.rock, of a "nut integrally (fixed 7. In a coaland rock-mining machine, thecombination with a tube, and jaws arranged in the fore-portion of said tube and adapted to penetrate into the surrounding coal or rock, of a nut integrally fixed to said tube, said tube apertured so as to permit the passage of the said jaws, a threaded feed-bar adapted to screw forward and backward .in said nut, a rod arranged in front of said feed bar within said tube and adapted to slide within :said tube with the forward. movement'of said feed bar, :and a step-block arranged at the forward end of the said rod, said step-bloclnadapted to rest against the bottom "of the rhole drilled into the coal or rock, 'the said jaws, in their extended :position, adapted to catch and tear along with them toward the entrance of the drill-hole the split-off -.coal or rock as soon as the ifeedebar is being turned on in the same sense after the step-lilookisjin engagement with the bottom of the borehole, substantially as set forth.

8. In a 'coaland rock-mining machine, the combination with a tube,';jaws arranged in the fore-portion ofzsaid rtubeand adapted to penetrate into the surroundingcoal'or rock, of a nut integrally fixed to said 'tube, said tube apertured soas to permitit-he passage of the said jaws, a threaded ifeed-ba-r ada-pted to screw forwardand backward in said nut, a :rod arranged in front {of said feed bar within said tube and adapted to slide within saidtube with the :forward movement 'ofsaid feed b'ar andailever-handle fitted to the back extremityo-f said feed bar and adapted to rotate thezsa-id feed bar, substantially as set forth.

9. In a coal-- and rock-mining machine the combination -witha tube, jawsarranged in thevfore-portion of said tube and-adapted to penetrate into the surrounding 'coal or rock,- of a nut integrallyfixed-to said .tube, said tube apertured so asto ipermit-the :passage of the said jaws, a threaded feed-bar adapted to screw [forward and backward in said nut, a rod arranged in front of said feed bar within said tube and adapted to slide within said tube with the forward unovernent of said feed bar, and ,a handwheel fitted to the back extremity of said feedbar and adapted to. rotatethesaid feed bar, substantially asset forth.

l0. In a c'oaluandiroek-mi-ning machine, the combination "with a in the foreportion ofsaidrtube and adapted to penetrate into the :surrounding :coal or tosaid tube, said tube apertured so asto permit the :passage of the, said jaws, threaded fee dbar adapted to screw forward and "backward in said nut, a rod arranged -.in [front :of said vfeed bar within said tube and lada pted to slide within said .tube "with the iforward movement of said feed bar, and a lever tube, jaws arrange-d arrangement attached to the said rod and adapted to push the said jaws radially outward, substantially as set forth.

11. In a coaland rook-mining machine, the combination with a tube jaws arranged in the fore-portion of said tube and adapted to penetrate into the surrounding coal or rock, of a nut integrally fixed to said tube, said tube apertured so as to permit the passage of the said jaws, a threaded feed-bar adapted to screw forward and backward in said nut, a rod arranged in front of said feed bar within said tube and adapted to slide within said tube with the forward movement of the said feed bar, a step block, 15

and a friction-reducing" device positioned intermediate the said feed bar and the said rod, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ADOLF LINNEMANN. Witnesses:

WLAD NIDRIC, E. HOTZERMEIN. 

